An explanatory mixed methods study on the validity and validation of students' assessment results in the undergraduate surgery course.

Background/purpose: There is inadequate evidence of reported validity of the results of assessment instruments used to assess clinical competence. This study aimed at combining multiple lines of quantitative and qualitative evidence to support interpretation and use of assessment results.

Method: This study is a mixed methods explanatory research set in two stages of data collection and analysis (QUAN : qual).

Risk factors of coronary heart disease among medical students in King Abdulaziz University, Jeddah, Saudi Arabia.

Background: Nowadays, Cardiovascular Diseases (CVDs) represents an escalating worldwide public health problem. Providing consistent data on the magnitude and risk factors of CVDs among young population will help in controlling the risks and avoiding their consequences.

Objective: The objective was to estimate the prevalence of risk factors of Coronary Heart Disease (CHD) among medical students during their clinical clerkship (4th - 6th years).

Autoimmune thrombocytopenia. Is it a different disease or different aspects of a single disease?

Objective: To evaluate the association between autoimmune thrombocytopenia with other autoimmune disorders, to show if they are different autoimmune diseases or one disease with different presentations at the same time, and to study the effect of treatment on platelet count in different thyroid condition.

Methods: In this retrospective study, we included 141 patients with thrombocytopenic purpura. The result of thyroid function test, thyroid autoantibodies, Coombs' reactivity, anti-nuclear antibody, and double-stranded DNA were analyzed.

Gastrointestinal Non-Hodgkin's lymphoma: a clinico-pathological study.

Objectives: The aim of this study is to determine the clinico-pathological features of primary gastrointestinal non-Hodgkin's lymphoma (GI NHL) at King Abdulaziz University Hospital, Jeddah, and to compare our results to those reported in the literature.

Materials And Methods: Twenty-three adult patients with primary GI NHL diagnosed over a 5-year period (2000 through 2005) were retrospectively studied clinically and histopathologically. They were classified using the REAL/WHO histopathologic classification.